Food can become contaminated by bacteria from other foods. This type of cross-contamination is especially dangerous if raw foods come into contact with cooked foods.Here are some examples of food-to-food cross-contamination: 1  In a refrigerator, meat drippings from raw meat stored on a top shelf might drip onto cooked vegetables placed on lower shelf.ood can become contaminated by bacteria from other foods. This type of cross-contamination is especially dangerous if raw foods come into contact with cooked foods.
Best Answer: Putting batteries in the freezer or refrigerator doesn't necessarily prolong their life. Alkaline batteries stored at room temperature self discharge at a rate of less than two percent per year. So normally refrigerating or freezing them will only help maintain their charge by a tiny amount.
March 31, 2015. 1  Resetting a battery using the freezer serves as a do-it-yourself way to improve battery life. 2  Turn off your cell phone by holding the Power button. 3  Remove the back case from your cell phone and remove the battery from the cell phone.  Place the battery in a sealable plastic bag and place it in the freezer.